diff --git a/code/rest/matter_dao.go b/code/rest/matter_dao.go
index 8075198..1f2c5ef 100644
--- a/code/rest/matter_dao.go
+++ b/code/rest/matter_dao.go
@@ -518,9 +518,10 @@ func (this *MatterDao) Delete(matter *Matter) {
 		//delete from db.
 		db := core.CONTEXT.GetDB().Delete(&matter)
 		this.PanicError(db.Error)
-
-		//delete dir from disk.
-		util.DeleteEmptyDir(matter.AbsolutePath())
+		if util.PathExists(matter.AbsolutePath()) {
+			//delete dir from disk.
+			util.DeleteEmptyDir(matter.AbsolutePath())
+		}
 
 	} else {
 
diff --git a/code/rest/task_service.go b/code/rest/task_service.go
index ae84857..e9ca22d 100644
--- a/code/rest/task_service.go
+++ b/code/rest/task_service.go
@@ -133,9 +133,10 @@ func (this *TaskService) doScanTask() {
 				this.logger.Info("scan spaceName = %s", space.Name)
 
 				//find admin as operator.
-				adminUser := this.userDao.FindAnAdmin()
-				this.matterService.DeleteByPhysics(request, adminUser, space)
-				this.matterService.ScanPhysics(request, adminUser, space)
+				// adminUser := this.userDao.FindAnAdmin()
+				user := this.userDao.FindByUuid(space.UserUuid)
+				this.matterService.DeleteByPhysics(request, user, space)
+				this.matterService.ScanPhysics(request, user, space)
 
 			})